Unable to rebuild part 1

[infraredowl]

For some reason a part I have built is not rebuilding and is creating ridiculous save times when saving an assembly which uses the part (bringing up "save although not resolved" messages at least twice each save).

The part in question is hollow cylindrical with a tapped hole with the hole axis running perpendicular thru the cylinder axis (built using the hole wizard). The hole center point is coincident with the cylinder OD and the depth is blind but cuts all the way thru the wall of the cylinder (ie not thru all or up-to surface; I've been having trouble with up to surface as well for some reason). After inserting this tapped hole the part has not been able to be rebuilt since.

The only thing I can think may be causing this is a warning message I recieved after hitting OK to place the hole. It stated that "one or more of the faces selected are not recognized". The only face that is selected is the curved OD of the cylinder where I set my first constraint. Perhaps there is some rebuild requirement in the program based on the comparison of the hole sketch and cylinder OD (such as there is an acceptable ratio of hole dia. and the curved surface it is placed on)? Thanks in advance.

 

[Theophilus]

I think your problem lies in the "up to surface" feature. If you make a blind cut (or hole or whatever) using a cylindrical surface as a reference for your blind depth, the sketch you are extruding will "see" your cylindrical surface twice as it makes the cut--yet it is only a single surface. SW doesn't know what you mean--which encounter of the surface do you want to use?

If you split the surface, I think your problem will disappear. Use a split line to create a single surface for your "up to surface" reference. By "single surface", I mean one that cannot be hit twice by the same feature. So you might want two semi-cylindrical surfaces instead of a single cylindrical surface that can be "hit" twice by a sincel cut. This will eliminate the confusion.

Otherwise, you can change the nature of your blind cut so it doesn't refer to the cylindrical surface, but something more absolute, like a plane.

Hope that helps.




Jeff Mowry
Industrial Designhaus, LLC

http://www.industrialdesignhaus.com